Finding the Third Proportional to 1,215,676 and 2,645,408

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,676 : 2,645,408 = 2,645,408 : x
2. Step 2: Convert to fraction form
   1,215,676/2,645,408 = 2,645,408/x
3. Step 3: Cross multiply
   1,215,676x = 2,645,408 × 2,645,408
4. Step 4: Simplify right side
   1,215,676x = 6,998,183,486,464
5. Step 5: Solve for x
   x = 6,998,183,486,464/1,215,676
6. Step 6: Final answer
   x = 5,756,618.94